Implement cd and pwd commands

src/navigate/CMakeLists.txt

@@ -4,6 +4,7 @@ add_executable(${PROJECT_NAME}
 	main.cpp
 	commandline.cpp
 	commandprocessor.cpp
+	dirmanager.cpp
 )
 
 target_include_directories(${PROJECT_NAME}

src/navigate/commandprocessor.cpp

@@ -74,7 +74,7 @@ namespace din {
 
 	template <typename Iterator>
 	struct CommandGrammar : boost::spirit::qi::grammar<Iterator, ParsedCommand(), boost::spirit::unicode::space_type> {
-		explicit CommandGrammar ( void );
+		CommandGrammar ( void );
 
 		boost::spirit::qi::rule<Iterator, ParsedCommand(), boost::spirit::unicode::space_type> start;
 		boost::spirit::qi::rule<Iterator, std::string(), boost::spirit::unicode::space_type> quoted_string;
@@ -96,9 +96,10 @@ namespace din {
 		using boost::spirit::qi::lexeme;
 		using boost::spirit::unicode::char_;
 		using boost::spirit::unicode::space;
+		using boost::spirit::qi::string;
 
 		quoted_string %= lexeme['"' >> *(char_ - '"') >> '"'];
-		argument %= lexeme[+(char_ - space)];
+		argument %= lexeme[+(string("\\ ") | (char_ - space))];
 		string_arg %= quoted_string | argument;
 		start = argument >> *string_arg;
 	}

src/navigate/dirmanager.cpp

@@ -0,0 +1,106 @@
+/* Copyright 2016, Michele Santullo
+ * This file is part of "dindexer".
+ *
+ * "dindexer" is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * "dindexer" is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with "dindexer".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "dirmanager.hpp"
+#include "helpers/infix_iterator.hpp"
+#include <boost/spirit/include/qi.hpp>
+#include <boost/range/algorithm/copy.hpp>
+#include <sstream>
+#include <boost/phoenix/bind/bind_function.hpp>
+#include <boost/phoenix/operator.hpp>
+
+namespace qi = boost::spirit::qi;
+
+namespace din {
+	namespace {
+		typedef std::vector<std::string> StringList;
+
+		std::string hex_to_str (unsigned int parChara) {
+			const char curr = static_cast<char>(parChara);
+			return std::string(&curr, 1);
+		}
+
+		template <typename Iterator>
+		struct PathGrammar : public qi::grammar<Iterator, StringList()> {
+			PathGrammar ( void );
+
+			qi::rule<Iterator, StringList()> start;
+			qi::rule<Iterator, std::string()> diritem;
+			qi::rule<Iterator, std::string()> escape;
+			qi::rule<Iterator, std::string()> hex_code;
+			qi::uint_parser<unsigned int, 16, 2, 2> hex_chara;
+		};
+
+		template <typename Iterator>
+		PathGrammar<Iterator>::PathGrammar() :
+			PathGrammar<Iterator>::base_type(start)
+		{
+			namespace px = boost::phoenix;
+			using boost::spirit::qi::lit;
+			using boost::spirit::qi::char_;
+			using boost::spirit::qi::_val;
+			using boost::spirit::_1;
+
+			start %= *lit("/") >> *(diritem >> *lit("/"));
+			diritem %= +(escape | (char_ - '/' - '\\' - ' '));
+			escape %= lit("\\") >> (hex_code | char_);
+			hex_code = lit("x") >> hex_chara[_val += px::bind(&hex_to_str, _1)];
+		}
+	} //unnamed namespace
+
+	void DirManager::push_piece (const std::string& parPiece) {
+		using boost::spirit::qi::parse;
+
+		PathGrammar<std::string::const_iterator> gramm;
+		auto piece_begin = parPiece.begin();
+		const std::string::const_iterator piece_end = parPiece.end();
+		StringList result;
+
+		const bool parse_result = parse(
+			piece_begin,
+			piece_end,
+			gramm,
+			result
+		);
+
+		if (not parPiece.empty() and parPiece[0] == '/') {
+			m_stack.clear();
+		}
+
+		for (auto&& itm : result) {
+			if (itm == "..") {
+				if (not m_stack.empty()) {
+					m_stack.pop_back();
+				}
+			}
+			else if (itm == ".") {
+			}
+			else {
+				m_stack.push_back(std::move(itm));
+			}
+		}
+
+		assert(parse_result);
+	}
+
+	std::string DirManager::to_string() const {
+		std::ostringstream oss;
+		oss << '/';
+		boost::copy(m_stack, infix_ostream_iterator<std::string>(oss, "/"));
+		return oss.str();
+	}
+} //namespace din

src/navigate/dirmanager.hpp

@@ -0,0 +1,39 @@
+/* Copyright 2016, Michele Santullo
+ * This file is part of "dindexer".
+ *
+ * "dindexer" is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * "dindexer" is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with "dindexer".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef id0F3472647B3E45AE8A30319AE7C76477
+#define id0F3472647B3E45AE8A30319AE7C76477
+
+#include <vector>
+#include <string>
+
+namespace din {
+	class DirManager {
+	public:
+		DirManager ( void ) = default;
+
+		void push_piece ( const std::string& parPiece );
+		std::string to_string ( void ) const;
+
+	private:
+		using StackType = std::vector<std::string>;
+
+		StackType m_stack;
+	};
+} //namespace din
+
+#endif

src/navigate/main.cpp

@@ -17,6 +17,7 @@
 
 #include "commandline.hpp"
 #include "commandprocessor.hpp"
+#include "dirmanager.hpp"
 #include <iostream>
 #include <ciso646>
 #include <string>
@@ -27,7 +28,7 @@ namespace {
 	void do_navigation ( void );
 
 	bool on_exit ( void );
-	void on_cd ( const std::string& parDir );
+	void on_pwd ( const din::DirManager& parDirMan );
 } //unnamed namespace
 
 int main (int parArgc, char* parArgv[]) {
@@ -52,8 +53,8 @@ namespace {
 	bool on_exit() {
 		return true;
 	}
-	void on_cd (const std::string& parDir) {
+	void on_pwd (const din::DirManager& parDirMan) {
-		std::cout << "Would cd into " << parDir << '\n';
+		std::cout << parDirMan.to_string() << '\n';
 	}
 
 	void do_navigation() {
@@ -62,10 +63,14 @@ namespace {
 		bool running = true;
 		std::string curr_line;
 		din::CommandProcessor proc;
+		din::DirManager dir_man;
 		proc.add_command("exit", &on_exit, 0);
-		proc.add_command("cd", &on_cd, 1);
+		proc.add_command("cd", std::function<void(const std::string&)>(std::bind(&din::DirManager::push_piece, &dir_man, std::placeholders::_1)), 1);
+		proc.add_command("pwd", std::function<void()>(std::bind(&on_pwd, std::ref(dir_man))), 0);
 		do {
-			std::getline(inp, curr_line);
+			do {
+				std::getline(inp, curr_line);
+			} while (curr_line.empty());
 			running = proc.exec_command(curr_line);
 		} while (running);
 	}